1. N.B. Vargaftik: Tables on the Thermophysical Properties of Liquids and Gases ( Wiley, New York 1975 )
2. I.F. Silvera: Rev. Mod. Phys. 52, 393 (1980)
3. Landolt-Börnstein: Numerical Data and Functional Relationships in Science and Technology, Group I, Vol. 3, Numerical Tables for Angular Correlation Computations in a-, ß-and y-Spectroscopy (Springer, Berlin, Heidelberg 1968)
4. M. Haissinsky: Nuclear Chemistry and Its Applications ( Addison-Wesley, Reading, MA 1964 ) p. 245
5. H.M. Mittelhauser, G. Thodos: Cryogenics 4, 368 (1964)